Conductivity method is used for the study of the dissolution of Ca(OH)2 in water and in mixed solvent systems. The thermodynamic parameters for the dissolution of Ca(OH)2 such as ΔG°, ΔS°, ΔH° were calculated from solubility values at different temperatures in aqueous medium and in mixed solvent systems (Water+1-propanol, water+2-propanol,water+DMSO and water + THF). It was found that the solubility and solubility product of Ca(OH)2 significantly decreased linearly by increasing percentage composition of the mixed solvent systems. The Gibbs free energy ΔG°, enthalpy ΔH° and ΔS° were also changed. These results were in agreement with the dielectric constant value of the solvents used in the study.
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